Dataset Information


Timing of global regression and microbial bloom linked with the Permian-Triassic boundary mass extinction: implications for driving mechanisms.

ABSTRACT: New high-resolution U-Pb dates indicate a duration of 89?±?38?kyr for the Permian hiatus and of 14?±?57?kyr for the overlying Triassic microbial limestone in shallow water settings of the Nanpanjiang Basin, South China. The age and duration of the hiatus coincides with the Permian-Triassic boundary (PTB) and the extinction interval in the Meishan Global Stratotype Section and Point, and strongly supports a glacio-eustatic regression, which best explains the genesis of the worldwide hiatus straddling the PTB in shallow water records. In adjacent deep marine troughs, rates of sediment accumulation display a six-fold decrease across the PTB compatible with a dryer and cooler climate as indicated by terrestrial plants. Our model of the Permian-Triassic boundary mass extinction (PTBME) hinges on the synchronicity of the hiatus with the onset of the Siberian Traps volcanism. This early eruptive phase released sulfur-rich volatiles into the stratosphere, thus simultaneously eliciting a short-lived ice age responsible for the global regression and a brief but intense acidification. Abrupt cooling, shrunk habitats on shelves and acidification may all have synergistically triggered the PTBME. Subsequently, the build-up of volcanic CO2 induced a transient cool climate whose early phase saw the deposition of the microbial limestone.


PROVIDER: S-EPMC5338007 | BioStudies | 2017-01-01T00:00:00Z

REPOSITORIES: biostudies

Similar Datasets

1000-01-01 | S-EPMC5899431 | BioStudies
1000-01-01 | S-EPMC4983274 | BioStudies
1000-01-01 | S-EPMC2889361 | BioStudies
2020-01-01 | S-EPMC7080820 | BioStudies
1000-01-01 | S-EPMC6344494 | BioStudies
1000-01-01 | S-EPMC4780601 | BioStudies
1000-01-01 | S-EPMC4460569 | BioStudies
1000-01-01 | S-EPMC5099577 | BioStudies
2019-01-01 | S-EPMC6452079 | BioStudies
2015-01-01 | S-EPMC4546057 | BioStudies